Improvement in fanning-mills



T. WILLSON. Fanning-Mills.

No. 217.760. Patented July 22,1879.

m'vzmn A ZMW TTORNEYS.

MPETERS, PHOTO LITHDGRAFHER WASMNGTON. 0 C.

UNITED STATES PATENT CFFICE.

THOMAS WILLSON, OF RICHMOND HILL, ONTARIO, CANADA.

IMPROVEMENT IN 'FANNlNG-MILLS.

Specification forming part of Letters Patent No. 217,760, dated July 22,1879; application filed April 18, 1876.

To all whom it may concern:

Be it known that I, THOMAS WILLsON, of Richmond Hill, in the county ofYork, Province of Ontario and Dominion of Canada, have invented a newand Improved Fanning-Mill, of which the following is a specification.

The invention consists of the shoe constructed in two parts, so as towork independently, and having the lower part, containing the screen,provided with devices forimparting to it ajolting motion in addition tothe shaking motion.

Figure 1 is a side elevation of the fanningmill. Fig. 2 is alongitudinal sectional elevation taken on line a: 00 of Fig. 8. Fig. 3is a rear view. Fig. 4 is a horizontal section on line y y of Fig. 2.

Similar letters of reference indicate corresponding parts.

The shoe is constructed in two parts, A A, to shake independently. Theupper part has two sets of combined zinc sieves, N N, andis suspended bysteel straps B, and the lower part is suspended from the upper part bythe small slotted plates P P, so as to work either with or withoutrollers. The lower part has rollers 0 working oncorru gated brackets RR, for producing a jolting motion to the screen. The two sets ofcombined sieves in the upper part of shoe enable the grain to be cleanedtwice at one operation.

The dirt from the upper set of sieves is carried away sidewise downtrough O, and escapes through orifices in sides of shoe. The

grain will, however, shake down onto the lower set of sieves, which areplaced one inch apart and parallel to each other.

It will be seen by this operation thatthe cleansing process isaccomplished more by the shake than by the wind.

The bottom part of the shoe, which contains the screen F, is suspendedby four iron plates, P P, which are attached to the upper part of shoe,and which allow it to swing with afree motion and independently of theupper part.

It will be seen that the screen will have two motions, one horizontal,as in common use, and a jolting motion, caused by the rollers passingover the corrugations 011 the brackets. The slotted plates P allow thelower part to be jolted up and down. This motion will greatly assist inkeeping the screen from clogging; also, by this means can be used ascreen that in a mill with a lighter shake would be useless on accountof clogging.

Both top and bottom parts of the shoe are driven horizontally from theelbow W, which has several holes in its arms for adjusting the length ofshake, by which it will be seen that the motion of either or both can beincreased or diminished, as circumstances may require.

Having thus described my invention, I claim as new and desire to secureby Letters Patcut- 1. The shoe made in two parts, of which the upper ishung by four straps and the lower by four slotted plates, in combinationwit-h roller 0 and corrugated brackets R, to'permit a jolting as well asa shaking motion.

2. A fanning-mill shoe constructed in two parts, the lower suspendedfrom the upper, and having an independent jolting as well as a shakingmotion, as and for the purpose specified.

THOMAS WILLSON.

Witnesses B. REDDITT, O. SWAINSON.

